You are not being rude at all and are right to point out that we have strayed from Kilkenny. 
Soryy, but I did not see on the other thread, that information which I have posted on here.If I am repeating this I must have missed it and apologise again.
The Ryan family in Manchester were pointed out by Maureen but was not followed up.
My attempts here are to show that Daniel Ryan was in Manchester too at least from 1841 onwards and likely before as Catherine is already married by then and that as the family are living side by side, that it is very probable that it is Catherine’s family.
By going through English censuses, there is only the one birthplace from all the family which gives Kilkenny. The other thread was more about the Yates family etc so I don’t think this is a waste of time but perhaps others do. 
Unfortunately, try as we have, there are no Kilkenny records which would definitely match up. There are a few Valentine Ryans and a couple of births with parents Daniel Ryan and Catherine but not this family names.
Added
I am not being rude either just explaining my attempts to help.
This has been my strategy too, as the only definite piece of information we have re Catherine Ryan's origin in Ireland is Kilkenny on one census. Poking about in the Ryan family in Manchester is preferable to poking Ryan haystacks in Kilkenny, although I've had a go at the latter. Without name of a parish, town, village or preferably townland in Kilkenny it is needle-in-haystack.
:)Existence of parish registers from the time of Catherine's birth is patchy, surviving ones have gaps, some entries and whole pages are hard to read or illegible. There may have been more than one Daniel Ryan who had a daughter Catherine in Kilkenny in those years. We need to build a picture of the Ryan family in Manchester.
Some Irish people in Britain gave more detail re p.o.b. in a later census. The most helpful is townland. Some put nearest town or post-town. The Ryan family have not been forthcoming in this respect.
Visitors or lodgers from Ireland on a census sometimes provide a clue to origin of family. Some were relatives or neighbours from home. It was common for these to come over as seasonal workers.
